<template>
  <div class="hello">
    <h1>{{ msg }}</h1>
    <h1>{{ reverseData(name) }}</h1>
    {{urlHash}}
    <input v-model="name" type="text">
    <br>
    <input v-model="inputdata" @keyup.enter="inputdownhandler('ttttt')" type="text">
    <br>
    <div v-show="inputdata >= 90"> A </div>
    <div v-show="inputdata >= 60 && inputdata <80">B</div>
    <div v-show="inputdata >=0 && inputdata <60">C</div>

    <button @click="onclickhandler" style="margin-top: 12px">click</button>
    <br>
    {{ts|parseTime}}
    <ul>
      <li v-for="(item,index) in hosts" :key="item.ip">{{item.ip}} - {{item.os}} - {{index}}</li>
    </ul>


    <p>
      For a guide and recipes on how to configure / customize this project,<br>
      check out the
      <a href="https://cli.vuejs.org" target="_blank" rel="noopener">vue-cli documentation</a>.
    </p>
    <h3>Installed CLI Plugins</h3>
    <ul>
      <li><a href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-babel" target="_blank" rel="noopener">babel</a></li>
      <li><a href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-eslint" target="_blank" rel="noopener">eslint</a></li>
    </ul>
    <h3>Essential Links</h3>
    <ul>
      <li><a href="https://vuejs.org" target="_blank" rel="noopener">Core Docs</a></li>
      <li><a href="https://forum.vuejs.org" target="_blank" rel="noopener">Forum</a></li>
      <li><a href="https://chat.vuejs.org" target="_blank" rel="noopener">Community Chat</a></li>
      <li><a href="https://twitter.com/vuejs" target="_blank" rel="noopener">Twitter</a></li>
      <li><a href="https://news.vuejs.org" target="_blank" rel="noopener">News</a></li>
    </ul>
    <h3>Ecosystem</h3>
    <ul>
      <li><a href="https://router.vuejs.org" target="_blank" rel="noopener">vue-router</a></li>
      <li><a href="https://vuex.vuejs.org" target="_blank" rel="noopener">vuex</a></li>
      <li><a href="https://github.com/vuejs/vue-devtools#vue-devtools" target="_blank" rel="noopener">vue-devtools</a></li>
      <li><a href="https://vue-loader.vuejs.org" target="_blank" rel="noopener">vue-loader</a></li>
      <li><a href="https://github.com/vuejs/awesome-vue" target="_blank" rel="noopener">awesome-vue</a></li>
    </ul>
  </div>
</template>

<script>
export default {
  name: 'HelloWorld',
  data() {
    return {
      inputdata: '',
      name: 'lwqlwq',
      age:18,
      hosts: [{ip:'127.0.0.1',os:'linux'},{'ip':'192.168.0.1',os:'windows'}],
      urlHash: '',
      ts: Date.now(),
    }
  },

  created() {
    let that = this
    window.onhashchange = function () {
      console.log('URL发生变化',window.location.hash);
      that.urlHash = window.location.hash
    };
  },

  // filters: {
  //   parseTime: function (value) {
  //     let date = new Date(value)
  //     return `${date.getFullYear()}-${date.getMonth()+1}-${date.getDate()} ${date.getHours()}:${date.getMinutes()}`
  //   }
  // },

  beforeCreate() {
    console.log("printprint")
  },



  methods: {
    onclickhandler() {
      alert("提交成功!")
    },
    inputdownhandler(data) {
      alert(`get: ${this.inputdata} - ${data}`)
    },
    reverseData(data) {
      return data.split('').reverse().join('')
    },
  },
  props: {
    msg: String
  }
}

</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
h3 {
  margin: 40px 0 0;
}
ul {
  list-style-type: none;
  padding: 0;
}
li {
  display: inline-block;
  margin: 0 10px;
}
a {
  color: #42b983;
}
</style>
